Discussion
Home ‣ Biochemical Engineering ‣ Fermentation Reactors Comments
- Question
Which of the following would be correct concerning the concentration of biomass (X). growth limiting substrate (S) and product (P) in a chemostat when the cells have been washed out?
Options- A. X,S and P will be zero
- B. X,S and P can not be predicted for the above condition
- C. X and P will be zero while S is equal to the substrate concentration in feed
- D. None of the above
- Correct Answer
- X and P will be zero while S is equal to the substrate concentration in feed
- 1. When the product formation is approximately equal to the rate of cell growth, the pattern of product formation is termed as
Options- A. uncoupled
- B. growth associated
- C. non-growth associated
- D. metabolically uncoupled Discuss
- 2. Which of the following is best described as secondary metabolite?
Options- A. Acetic acid produced from the oxidation of ethanol
- B. Ethanol from the fermentation of glucose
- C. Penicillin
- D. Citric acid from the partial oxidation of glucose Discuss
- 3. A strain of Escherichia coli has a maximum specific growth rate of 0.8 h-1 on a glucose based medium. If this organism is being grown in a chemostat with a dilution rate of 1.2 h-1, then at steady state the concentration of E. coli in the same medium will
Options- A. increase
- B. be zero
- C. change randomly
- D. decrease Discuss
- 4. A fed-batch reactor containing 2 litre of medium and 0.1 g.l-l of biomass is fed with a medium containing 1 g.l-1 of substrate at 1 litre per hour. If after 10 hours, the concentration of biomass in the reactor was 0.2 g.l-1, then the biomass produced during the 10 hour period is
Options- A. 1.5 g
- B. 2.2 g
- C. 3.0 g
- D. 6.0 g Discuss
- 5. In a fluidized bed reactor mixing is achieved by
Options- A. gravity flow of fluid
- B. upward movement of the incoming feed
- C. diffusion
- D. both (a) and (b) Discuss
- 6. The fastest route of NADH reoxidation is
Options- A. aerobic respiration
- B. anaerobic respiration
- C. fermentation
- D. decomposition Discuss
- 7. The concentration of biomass in a continuous stirred tank reactor is 20 g dry weight per litre. What would be the concentration of biomass in the effluent?
Options- A. Greater than 20 g dry weight per litre
- B. Approximately 20 g dry weight per litre
- C. Lesser than 20 g dry weight per litre
- D. More than 30 g dry weight per litre Discuss
- 8. In plug flow tubular reactor the axial velocity profile on cross-section will be
Options- A. constant
- B. varying with time
- C. non-linear
- D. power function of time Discuss
- 9. The ideal tubular-flow fermenter without radial variations is called a
Options- A. plug flow fermenter
- B. continuous stirred tank fermenter (CSTF)
- C. column fermenter
- D. any intensity of dilution rate near the wash out points Discuss
- 10. When Escherichia coli grow in a well aerated medium, which of the following will occur?
Options- A. Fructose di-phosphate accumulation inside the cells leading to cell respiration
- B. Fructose di-phosphate accumulation inside the cells leading to fermentation
- C. Fructose di-phosphate will accumulate regardless of the medium composition
- D. Fructose di-phosphate will accumulate inside the cells leading to anaerobic respiration Discuss
Fermentation Reactors problems
Search Results
Correct Answer: growth associated
Correct Answer: Penicillin
Correct Answer: be zero
Correct Answer: 2.2 g
Correct Answer: both (a) and (b)
Correct Answer: fermentation
Correct Answer: Approximately 20 g dry weight per litre
Correct Answer: constant
Correct Answer: plug flow fermenter
Correct Answer: Fructose di-phosphate accumulation inside the cells leading to fermentation
Comments
There are no comments.Programming
Copyright ©CuriousTab. All rights reserved.